Operating and locking device for pivoting panels



July 27 1926. 1,594,109

c. H. H. RODANET ommwme AND LOCKING DEVICE FOR PIVOTINGPANELS Filed March 26,- 1925 172106732702 C. /7 H fO i? mums 112mm Patented July 27, 1926.

UNITED STATES 1,594,109 PATENT OFFICE.

Emmi noneim'r, or rams, amen, assmuon. 'ro cnmns 'ronnns wnmxmr, or rams, names.

I OPERATING AND LOCKING DEVICE FOR PIVOTING PANELS.

Application filed March 26, 1925, Serial No. 18,688, and in France March 81, 1924.'

It has already been proposed, for efiecting the angular displacements and locking in and its support a mechanism for transmission of movement by worn and worm wheel. As the worm wheel is arranged on one of the sides of the panel, it results therefrom that the leverage which must produce the angular displacement is very short, since its length is that of the radius of the said wheel. The operation is, consequently, very laborious. Moreover, the screw threads of the worm and of the wheel wear off, so that the device becomes loose or takes some play, the locking in position of the panel isno longer absolute and the latter is subjected to displacements which determine shocks on the worm and worm wheel device, thus further increasing its deterioration.

The resent invention includes an operating an locking device for pivoting panels, which remedies the above mentioned inconveniences. For that purpose, the pivoting panel is integral'with a lever which can be angularly moved bya worm threaded-in a bearing mounted on the support of the said panel. In these conditions, a very supple drive is obtained as well as displacements reduced as desired and an absolute locking of the panel, whatever may be the position it occupies.

Inthe accompanying drawing Fig. 1 is a perspective view of, a form of construction of the device forming the subject-matter of the invention in its application to a wind screen for motor vehicle.

. Figs. 2 and 3am on external view and a vertical section of the said device.

As indicated in the foregoing, the tube a of the wind screen is. connected to a lever I), this tube a being supported by a fork piece a belonging to the central support d.

This lever 12 is provided with an oblong The screws h and c are left and righthanded and their pitches are different so as to constitute a differential s stem.

It will therefore be seen t at (a) The system of difl'erential screws 72.,

i, constitutes a speed reducing drive which.

acts, for producing the variations of inc1i'-' nation of the wind screen, on a lever b .of

any length. A 'very supple drive is thus obtained and the inclination of the wind screen can be adjusted with precision.

. (b) Owing to the number of screw threads in contact, the wear and the stresses acting on the same are reduced, so that a ositive locking of the wind screen is obtained in the position where it has been placed.

It is obvious that according to circumstances, the lever 17 can be placed above or below the pivoting axis of the. movable panel. In the same we theside of variable length, of the varia le triangle having for the two sides of constant length, the support 01 and the lever I), might be constituted by a single screw pivoting, on the thelever b and moving in the ring 7' acting as a nut.

What I claim as my invention and desireto secure by Letters Patent is 1. In a system for operating and locking rocking panels comprising an extensible system of telescopic screws, apivoting nut, fixed in rotation, for the outer screw, and means for imparting to the latter a move ment of rotation about its axis.

- 2. In a system for operating and locking rocking panels comprising an extensible sys-. tem of telescopic screws, a fixed frame, pivots on the said frame, a nut diametrically pivoted between the said pivots and fixed in rotation, a screw passing through the said nut, and means for imparting to the said screw a movement of rotation about its axis. 3. In a system for operating and locking rocking panels comprising an extensible system of telescopic screws, a frame carrying the ioint of the panel, pivots on the said fixed frame, a nut, fixed in rotation, diametrically pivoting between the said pivots, a screw-passing through the said nut, an operating handle rigidly secured on the said screw for imparting to the latter a movement of rotation about its axis. 7

In testimony whereof I have signed my name to this specification.

CHARLES E -M 5 HENRI RQDANIT. 

